Re: XML storing and management
From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Thu, 27 Sep 2007 14:07:50 -0300
Message-ID: <46fbe33a$0$4072$9a566e8b_at_news.aliant.net>
>
> "Hierarchical models such as XML" are not necessarily ordered-only
> data models. In fact most proposals for semistructured data models
> before XML weren't.
>
> But even in XML this is not a big problem. Whether reordering destroys
> information or not depends on your interpretation of the data. If you
> send me an XML document and in addition tell me that certain parts
> represent sets then I can reorder them without destroying any
> information. The fact that XML is an ordered data model only implies
> that it *might* destroy informaton, not that it *must*.
Date: Thu, 27 Sep 2007 14:07:50 -0300
Message-ID: <46fbe33a$0$4072$9a566e8b_at_news.aliant.net>
Jan Hidders wrote:
> On 27 sep, 16:27, Bob Badour <bbad..._at_pei.sympatico.ca> wrote:
>
>>Jan Hidders wrote: >> >>>On 27 sep, 02:19, JOG <j..._at_cs.nott.ac.uk> wrote: >> >>>>Ok, so why is it exactly cdt, despite the inherent flaws of a >>>>hierarchical model such as XML, it has seen such widespread uptake? >> >>>It's all hype, of course. >> >>>Btw., what fundamental flaws? >> >>Well, let's see... How about we start with: "The inability to re-order >>the data without changing meaning and without destroying information." ?
>
> "Hierarchical models such as XML" are not necessarily ordered-only
> data models. In fact most proposals for semistructured data models
> before XML weren't.
>
> But even in XML this is not a big problem. Whether reordering destroys
> information or not depends on your interpretation of the data. If you
> send me an XML document and in addition tell me that certain parts
> represent sets then I can reorder them without destroying any
> information. The fact that XML is an ordered data model only implies
> that it *might* destroy informaton, not that it *must*.
That's a nit. If one cannot always safely reorder, then one cannot safely reorder.
[snip] Received on Thu Sep 27 2007 - 19:07:50 CEST